SH-08-type cast iron welder make use of advanced electronic technology and digital control technology to improve the waveform and arc welding process performance, a comprehensive solution to cast the problem of poor welding performance products, such as stomata often after welding, deformation, easy to break, easy to produce white and welding cracks. 
 SH-08 type of welding cast iron supplement for ductile iron castings, gray iron castings, malleable iron and white cast iron and other iron products, welding, welding. Manual welding and coating, submerged arc welding, etc., compared with the welding of high efficiency, good quality, low cost, easy to operate, open arc no residue, solderability and high heat affected zone is small, the workpiece deformation, weld aesthetic advantages. 
 SH-08 type of cast iron products cast iron supplement welder addresses the following issues: 
 (1) white issue 
 Using CO2 gas welding current density, fast cooling after welding, base metal and wire from the hardened layer fusion zone microstructure analysis, the white layer analysis is intermittent, thickness <0.7mm. (In accordance with international practice, if the white layer thickness <1mm, the casting process has no effect on cutting tools, which can be ignored.) 
 (2) Welding produces thermal crack problem: 
 Usually cast iron welding, general welding cast iron should be carried out on the local rapid heating, uneven heating temperature is inevitable, when the thermal stress is greater than the tensile strength of cast iron welded parts, it will inevitably produce hot cracking . 
 SH-08 in the design of welding cast iron supplement when the use of advanced electronic technology and digital control technology to improve the waveform and arc welding process performance, using the yield limit as low as <200MPa, up to 400-500MPa, produced in the welding process Stress and over 200MPA, the weld can be deformed and to decrease stress, which most effectively prevent the appearance of hot cracks. 
 (3) fusion of the problem: 
 Some cast iron, due to "graphite" thick, high temperature or oil in the work environment, in the welding process to a certain extent affect the fusion of a serious roll when you can not weld. The use of special welding wire welding process can make the "graphite" burning, burning pool boiling leaving CO2 may promote fusion greatly changed matter sorted out after welding weld fully integrated matrix tightly. 
 (4) no heat before welding, stress relief after welding without heat treatment or annealing reduces the hardness problem processing zones. And ensure the fusion zone hardness Hbmax <220, and the weld zone and base metal compared to the color line.